Scrolling with two fingers with a UIScrollView

Question

I have an app where my main view accepts both touchesBegan and touchesMoved, and therefore takes in single finger touches, and drags. I want to im

Answer 1

Check out my solution:

#import “JWTwoFingerScrollView.h”

@implementation JWTwoFingerScrollView

- (id)initWithCoder:(NSCoder *)coder {
    self = [super initWithCoder:coder];
    if (self) {
        for (UIGestureRecognizer* r in self.gestureRecognizers) {
            NSLog(@“%@”,[r class]);
            if ([r isKindOfClass:[UIPanGestureRecognizer class]]) {
                [((UIPanGestureRecognizer*)r) setMaximumNumberOfTouches:2];
                [((UIPanGestureRecognizer*)r) setMinimumNumberOfTouches:2];
            }
        }
    }
    return self;
}

-(void)firstTouchTimerFired:(NSTimer*)timer {
    [self setCanCancelContentTouches:NO];
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    [self setCanCancelContentTouches:YES];
    if ([event allTouches].count == 1){
        touchesBeganTimer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(firstTouchTimerFired:) userInfo: nil repeats:NO];
        [touchesBeganTimer retain];
        [touchFilter touchesBegan:touches withEvent:event];
    }
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    [touchFilter touchesMoved:touches withEvent:event];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@“ended %i”,[event allTouches].count);
    [touchFilter touchesEnded:touches withEvent:event];
}

-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@“canceled %i”,[event allTouches].count);
    [touchFilter touchesCancelled:touches withEvent:event];
}

@end

It does not delays the first touch and does not stop when the user touches with two fingers after using one. Still it allows to cancel a just started one touch event using a timer.